Her Majesty was said to have been unimpressed by the episode, called Paterfamilias, which depicts Princes Charles’ experience at Gordonstoun School.

The plot centres on the debate between The Queen and Prince Philip over their son’s education and which school to send him.

The Queen is said to favour Eton, while The Duke of Edinburgh supposedly wanted Charles to follow in his father’s footsteps and attend the Scottish boarding school.

The episode shows Prince Philip in a flashback being punished for fighting, competing in cross-country runs in the bitter cold, and being made to build the front gate while battling the elements - though ultimately growing to love the school.

While Prince Charles did admit the school was tough, branding it “Colditz in kilts”, he later praised it, saying: “It was only tough in the sense that it demanded more of you as an individual than most other schools, mentally or physically.

“It taught me a great deal."

He boarded there until 1967, when he left for Cambridge University.

Series three of The Crown is underway, with Olivia Coleman set to take up the role of Her Majesty during the 1960s.

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